They however do have non-uniform lengths. If you don't trust me, have a batch of brass with the exact same headstamp and measure their lengths - I've calculated hundreds, they are doing being a truth vary in size. With all the FC brass I measured, Excessive spread was around 10 https://9mm-bullet-casing18517.answerblogs.com/38371545/indicators-on-reloading-9mm-ammo-you-should-know